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Influence of the Ca/P ratio on the morphology of fluorapatite crystals in SiO2-Al2O3-CaO-P2O5-K2O-F- glass-ceramics

机译:Ca / P比对SiO2-Al2O3-CaO-P2O5-K2O-F-玻璃陶瓷中氟磷灰石晶体形态的影响

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摘要

The formation of fluorapatite crystals with needle-like morphology was studied in glass-ceramics (GCs) of the System SiO2-Al2O3-CaO-P2O5-K2O-F-. X-ray diffraction (XRD), P-31 and Al-21 nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), temperature-dependent electric conductance measurements, and transmission electron microscopy (TEM) with energy dispersive X-ray analysis were used to study the influence of the Ca/P ratio of the starting glass composition on the apatite crystal morphology. The composition of the ambient glass hosting apatite crystals and particularly the calcium supersaturation herein is shown to be the key to an understanding of the apatite crystal morphology observed. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 29]
机译:在SiO2-Al2O3-CaO-P2O5-K2O-F-体系的玻璃-陶瓷中研究了具有针状形态的氟磷灰石晶体的形成。 X射线衍射(XRD),P-31和Al-21核磁共振(NMR),扫描电子显微镜(SEM),随温度变化的电导率测量以及具有能量色散X射线分析的透射电子显微镜(TEM)用于研究起始玻璃组合物的Ca / P比对磷灰石晶体形态的影响。显示出承载磷灰石晶体的环境玻璃的组成,尤其是本文中的钙过饱和,是理解所观察到的磷灰石晶体形态的关键。 (C)2001 Elsevier Science B.V.保留所有权利。 [参考:29]

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